<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
import { ElMessage } from 'element-plus'
//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)//true 登录 false 注册
//定义数据模型
const registerData = ref({//响应式对象，要获取值需要.value
    username: '',
    password: '',
    rePassword: ''
})
//校验密码的函数
const checkRePassword = (rule,value,callback) => {
    if(value  === ''){
        callback(new Error('请再次确认密码'))
    }else if(value !== registerData.value.password){
        callback(new Error('两次密码不一致'))
    }else{
        //执行到这里说明校验通过了
        callback()
    }
}
//定义表单校验规则
const rules={//在这里，每个表单项对应的都是一个数组
    username: [
        //5-16非空字符
        {required: true, message:'请输入用户名', trigger: 'blur'},//trigger：enum类型的验证逻辑的触发方式
        {min: 5, max: 16, message:'长度为5-16位的非空字符', trigger: 'blur'}//这里的message就是输入框下面的提示信息 
    ],
    password: [
        {required: true, message:'请输入密码', trigger: 'blur'},
        {min: 5, max: 16, message:'长度为5-16位的非空字符', trigger: 'blur'}
    ],
    rePassword: [//这里没有message，提示信息是由校验函数中的callback返回的
        {validator:checkRePassword,trigger:'blur'}// 校验器：函数名，触发方式
    ]
}

//调用后台接口完成注册
import { userRegisterService, userLoginService } from "@/api/user.js";
const register = async() => {
    //调用 user.js 中的userRegisterServ方法并接受后端的result类(json数据)
    let result = await userRegisterService(registerData.value);
    /* if(result.code === 0){
        //0：成功  1：失败
        alert(result.msg ? result.msg : '注册成功');
}else{alert('注册失败！')} */
// alert(result.msg ? result.msg : '注册成功');
ElMessage.success(result.message ? result.messasge : '注册成功');
}

//绑定数据，复用注册表单的数据模型registerData,登录的<el-form-item>添加 v-model
//表单数据校验
//登录函数
import { useTokenStore } from "@/stores/token.js";
import {useRouter} from 'vue-router'//导进来的时一个useRouter函数 ,可以直接调用
const router = useRouter()//只能在函数外定义
const tokenStore = useTokenStore();
const login = async () => {
    //调用接口完成登录
    let result = await userLoginService(registerData.value);
    /* if(result.code === 0){
        alert(result.msg ? result.msg : '登录成功！')
    }else {
        alert('登录失败！')
    } */
    ElMessage.success(result.message ? result.message : '登录成功！')
    //把token存储到pinia中
    tokenStore.setToken(result.data)
    //借助路由跳转页面
    router.push('/')
}

//定义函数清空数据模型的数据，防止用户在登录和注册切换时数据重现
const clearRegisterData = () => {
    registerData.value = {
        username:'',
        password: '',
        rePassword: ''
    }
}
</script>

<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!--                                                         绑定 校验规则 -->
            <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码" v-model="registerData.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="register">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false;clearRegisterData()">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username"><!-- rules&prop绑定校验规则  -->
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"</el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"  v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                        <el-link type="primary" :underline="false">忘记密码？</el-link>
                    </div>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button @click = "login" class="button" type="primary" auto-insert-space>登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
            url('@/assets/login_bg.jpg') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>